40mm Fan Velocity Stack (Bellmouth Intake)
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Lightweight 40mm fan velocity stack with vase-mode bellmouth; clears Hero Me Gen7 dual 5015 part coolers.
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A lightweight velocity stack (bellmouth intake) for 40 mm fans. The smooth flare reduces turbulence and noise, giving quieter airflow and better efficiency.
Designed to clear the dual 5015 part-cooling fans on the Hero Me Gen7 mount. The design consists of two parts:
Base: printed normally with mounting holes.
Bellmouth flare: printed in vase mode (Spiralize Outer Contour).
The bellmouth is a tight slip-fit into the base. If you have elephant’s foot or minor irregularities, carefully file or sand the edge -force it but not too much, as the bellmouth wall is thin and can break. It should seat fully into the base for proper airflow.
Print Notes
Base: normal slicing, 0.2 mm layer height, 2–3 walls, ~15% infill.
Bellmouth: vase mode (Spiralize Outer Contour ON), 1 wall, 0% infill, 0 top/bottom layers.
No supports needed.
Orient flat on the bed before slicing.
Cooling
In testing with Hero Me Gen7 dual 5015 fans, I ran them at 80% fan speed for clean results on the flare. For reference, I normally run only 30% because this setup is more effective than stock part coolers.A lightweight velocity stack (bellmouth intake) for 40 mm fans. The smooth flare reduces turbulence and noise, giving quieter airflow and better efficiency.
Designed to clear the dual 5015 part-cooling fans on the Hero Me Gen7 mount. The design consists of two parts:
Base: printed normally with two mounting holes.
Bellmouth flare: printed in vase mode (Spiralize Outer Contour).
The bellmouth is a tight slip-fit into the base. If you have elephant’s foot or minor irregularities, carefully file or sand the edge - do not force it, as the bellmouth wall is thin and can break. It should seat fully into the base for proper airflow.
Print Notes
Base: normal slicing, 0.2 mm layer height, 2–3 walls, ~15% infill. Or whatever you usually do.
Bellmouth: vase mode (Spiralize Outer Contour ON), 1 wall, 0% infill, 0 top/bottom layers.
No supports needed.
Orient flat on the bed before slicing.
Cooling
In printing with Hero Me Gen7 dual 5015 fans, I ran them at 80% fan speed for clean results on the flare. For reference, I normally run only 30% because this setup is more effective than stock part coolers.
You might want to run your part cooling fans on 100%
In the images, it's printed in add:north e-pla gold